Hall Effect Prism Sensor

Abstract

A physically unclonable function is an object that has characteristics that make it extremely difficult or impossible to copy. An array of randomly dispersed hard (magnetized) and soft (non-magnetized) magnetic particles that may be conducting or nonconducting that are disbursed in a binder create a particular magnetic field or capacitive pattern on the surface. This surface magnetic field and capacitive variations can be considered to be a unique pattern similar to fingerprint. The Hall effect prism is a sensor that measures the effects of these patterns by sensing the deformation of currents or electric potential flowing within or around a resistive substrate material that exhibits a substantial Hall effect coefficient.

We claim: 
     
         1 . A sensor comprising:
 a ceramic base used for rigidity;   a resistive substrate material applied by a laminating or coating process, wherein the implementation is part of a semiconductor process like complementary metal-oxide-semiconductor (“CMOS”) or charged-coupled device (“CCD”) camera sensors where the light sensitive is replaced by a resistive substrate material.   
     
     
         2 . A sensor array substrate comprising:
 a sensor array substrate layer;   additional layers stacked on top of the substrate to create interconnectivity to the substrate and route wiring channels to go to required bias and measurement circuitry;   a filter or key that is a thin layer of magnetic PUF material that will perturb the magnetic fields between the sensor and the PUF device being measured;   conductor pad connections to the substrate, wherein the conducting pads allow a current to flow within the substrate and the gaps between the conducting pads isolate one conducting pad from another; and   an insulating material that isolates the sensing area substrate from devices being measured.